Ironically, while I had to pop potions several rounds directly following each other as rabbit, as slime I had no issues even alone. But getting there was tough.
Skill Spear Throw seems very underwhelming in its effects. Same goes for "Lance of Gungir". Sword Rain skill name lacks a quote. Full Support ignores the inherited skills as well those of the partners, as well doesn't trigger after a in-battle transformations. It also didn't trigger at the fight against the town demon. Maxed out skills should be displayed differently.
It is not clear how to collect the missing materials for the supply quests. There is no way to look up "you need monster X, found at Y".
The "find cat" quest doesn't adjust "give fish" to the actual requested item.
Spiritual Border seems really iffy in its results. I've gotten different results despite the same routine in the same form in two subsequent battles, without changing anything. But in cat form, I don't even recover the Rebirth loss, which I at least always managed in other forms.
Also, Traveler skills don't appear anymore, but I'm not sure if that is due to cat form, or due to my soldier job, or due to the version change. Those at least had some use to fill out turns where I had nothing else to do.
Egg collector guy doesn't update his text after he added the quest or you have taken it. Similarly, the girl "cats are overrated" doesn't react to either fox or cat form.
Fast travel in town doesn't have northern parts added to the menu after opening up that part.